JPWO2005021084A1 - Catheter and medical connector - Google Patents

Abstract

The medical connection device (1) of the present invention has a hollow exterior portion (1) having an introduction port (3) and a discharge port (4) at both ends, and having a mounting port (5) and a handle insertion port (8). 2), a flow path switching unit (6) provided in the exterior part for switching between the flow path a from the introduction port to the discharge port and the flow path b from the introduction port to the mounting port, and joined to the mounting port An external connection portion (7), and the flow path switching portion includes a blocking portion (9) and a handle portion (10) coupled to the blocking portion, and the blocking portion is formed on the exterior portion. A cross section that can block the flow path a in close contact with the inner wall of the flow path a, and the handle portion has a cross section that can slide in close contact with the inner wall of the handle insertion port in the exterior portion; The flow path is switched by sliding the part.

Description

  The present invention relates to a medical connection device.

For administration of infusion solutions or drugs, blood transfusion, blood collection, body fluid collection, dialysis, etc., catheters, tubes etc. are used for conduction inside and outside the body, and for connection with devices such as infusion bags, blood bags, dialysis machines, etc. Medical instruments such as connectors, stopcocks, connecting pipes and stoppers are used.
These medical devices are connected to the living body for a relatively long period of time, and the infusion line may be exchanged in a timely manner. However, these medical devices are connected between the living body and the outside of the living body. Alternatively, sufficient care is required so that bacteria and the like do not enter the living body at the time of replacement.
Usually, the catheter is not regularly exchanged. For example, the infusion route needs to be exchanged about once every two weeks. In addition, when a catheter is used, infusion is performed all the time, so it is necessary to frequently replace the infusion bag.
In such a case, the drip solution is high in calories and rich in nutrients, and propagation of bacteria, infection, and contamination are more likely to occur than usual, so special attention is required to prevent the invasion of bacteria when replacing the drip route. Furthermore, for example, a patient who has inserted a catheter to perform peritoneal dialysis may have a reduced resistance to bacterial infection, and if pathogens enter the body, the symptoms may be worsened. If the catheter portion is contaminated with bacteria or the like, the catheter must be replaced, and the load on the patient may increase.
Conventionally, as a connection device between medical devices such as an infusion set, a transfusion set, and a catheter and an infusion route, a device for fitting and connecting male and female connectors is generally used (Patent Document 1). However, in this case, since there is no valve mechanism, there is a problem that when the connection part is detached, the inside of the flow channel is in contact with the outside air, so that it is easily exposed to bacterial contamination from the outside air. There is also a two-way stopcock equipped with a stopcock as a valve mechanism (Patent Document 2), but in this case, there is no change in the flow path, and the flow path is simply shut off, and the infusion route cannot be cleaned. There is also a three-way stopcock (Patent Document 3). In this case, since the inner surface of the female portion serving as a connection port is temporarily in contact with the outside air at the time of detachment, the flow path can be switched but the outside air is sufficiently blocked. It was not.
In addition, in conventional male and female connectors or stopcocks, dead spaces are generated in the vicinity of the connection device, and special attention has been required for measures against infection. The dead space is a portion remaining in the infusion tube as a flow stagnation or a liquid puddle during administration of the infusion. The occurrence of dead space may promote the growth of bacteria and the like, and it is required to reduce the occurrence of dead space as much as possible.
JP 2000-197707 A JP 2002-291905 A Japanese Patent Laid-Open No. 7-100212

The present invention is intended to solve the problems associated with the prior art as described above. When the drip bag or the drip route is exchanged, the catheter portion can be sealed, and the drip route can be sterilized and infusion exchange can be performed. It is an object of the present invention to provide a medical connecting device that can be easily implemented and has a structure that does not generate a dead space.
The present inventors have intensively studied to solve the above problems, and by using a medical connector that performs channel switching or channel blocking by a channel switching unit or channel blocking unit having slidability, At the time of infusion back or infusion route exchange, the catheter portion can be sealed, and the infusion route can be easily sterilized, infusion exchange, etc., and the present invention has been completed by finding that no dead space is generated. . That is, the present invention includes the following.
[1] The catheter according to the present invention is characterized in that the following medical connection device is connected to the end of the catheter.
Here, the term “connected” includes both a case where the medical connecting device is detachably connected to the catheter and a case where the medical connecting device is provided with an integral structure that cannot be removed.
[2] Among these, in the catheter of the present invention, it is preferable that the medical connection device is provided at the end of the catheter with an integral structure that cannot be removed. If it is an integral structure, it is possible to avoid the generation of a dead space at the connection site.
[3] A medical connection instrument according to the present invention has a hollow exterior part having an introduction port and a discharge port at both ends, and further equipped with a mounting port,
A flow path switching unit provided in the exterior part, for switching between a flow path (a) from the introduction port to the discharge port and a flow path (b) from the introduction port to the mounting port;
An external connection part joined to the mounting opening,
The flow path switching unit includes a blocking part and a handle part coupled to the blocking part, and the blocking part is in close contact with the inner wall of the flow path (a) of the exterior part to block the flow path (a). The handle portion has a cross section that can slide while being in close contact with the inner wall of the exterior portion, and the flow path is switched by sliding the flow path switching portion.
In the present invention, since the flow path switching unit slides to switch the flow path, the occurrence of dead space is suppressed and the flow path is easily switched.
The flow path switching unit used in the present invention includes a blocking part and a handle part, and the blocking part has a shape that blocks the flow path (a) in close contact with the inner wall of the exterior part. Therefore, the shape and size of the blocking part depend on the shape and size of the inner wall of the exterior part and are not limited, but it is usually preferable to have a shape and dimension that can be in close contact with the inner wall of the exterior part. For example, when the flow path is cylindrical, the blocking portion preferably has a circular cross section having a substantially similar diameter that can be in close contact with the inner wall of the exterior portion.
As the surface where the blocking part contacts the fluid, an elliptical shape or an elliptical shape having a convex depression can be preferably employed.
When the flow path is switched, the handle portion of the flow path switching portion slides in close contact with the inner wall of the exterior portion from the end opposite to the flow path of the handle toward the flow path (a). For this reason, the shape and size of the handle portion of the flow path switching portion are not limited depending on the shape and size of the corresponding inner wall of the exterior portion, but preferably have a shape and size that can slide while closely contacting the exterior portion.
Such a medical connecting device can prevent a dead space, and can seal the catheter part at the time of infusion back or infusion route replacement, and the infusion route can be kept attached to the catheter and the infusion route. Can be easily sterilized and exchanged. For this reason, it is possible to easily and effectively prevent infection of bacteria or the like during the exchange of the drip bag and drip route. Furthermore, the air mixed in the site connected to the inlet such as the drip route can be smoothly discharged.
[4] The exterior part may have a handle insertion opening. That is, in the medical connection instrument according to the present invention, regardless of the slide state of the flow path switching unit, the flow path switching unit may be housed in the exterior part, or a handle insertion port is provided in the exterior part, A part of the handle portion of the flow path switching unit can be brought out of the exterior part according to the slide of the switching unit.
In the case of the structure in which the handle insertion port is provided, a part of the handle part slides in close contact with the inner wall including the inner wall of the handle insertion port in the exterior portion. In such a case, since the size of the exterior part can be made compact, it is extremely useful for use in a medical field.
[5] In the medical connection instrument according to the present invention, it is preferable that the angle between the introduction port direction of the channel (a) and the sliding direction of the channel switching unit is 90 degrees or less. When the angle is 90 degrees or less, the change in the fluid pressure due to the blockage of the flow path (a) can be gradually reduced or increased, so that irritation to the user can be minimized.
[6] In the blocking part of the channel switching unit, the surface blocking the channel (a) preferably has a convex curved surface. When the blocking portion surface of the flow path switching section is such a convex curved surface, the flow path can be changed gradually, and the user's irritation due to the flow path switching can be further suppressed.
[7] The medical connection instrument of the present invention may include a slide fixing means for sliding or fixing the flow path switching unit.
Examples of such a slide fixing means include a method in which a slide cap is provided in the flow path switching unit, and a method in which a slide fixing means including a crank is provided in the flow path switching unit.
[8] Among such slide fixing means, as a method including a crank, for example,
A drive shaft penetrating the exterior portion;
A cylindrical crank having an eccentric center at a position eccentric from the center of the cylindrical circle, and wherein the drive shaft passes through the eccentric center in a direction perpendicular to the surface of the cylindrical circle;
Rotation means coupled to the drive shaft and rotating the crank eccentrically,
The crank is disposed in an elliptical space region provided in the flow path switching unit, and the drive shaft rotates eccentrically while the crank is inscribed in the inner wall of the elliptical space region. A slide is done,
There is a slide fixing means in which the inner wall surface of the elliptical space region and the outer wall of the crank are pressed against each other to fix the flow path switching unit.
The major axis direction of the elliptical space region is preferably parallel to the flow path (a), and the elliptical space region only needs to have a size that allows the crank to rotate eccentrically while being inscribed.
In such a slide fixing means, it is preferable that the diameter of the circle of the crank is set larger than the small diameter of the ellipse in the elliptical space region so that the crank fits in the elliptical space region. Free movement of the flow path switching unit can be controlled and fixed by friction between the crank and the wall surface of the elliptical space region.
Moreover, when the said crank is fixed, it is preferable that the press-contact direction of the inner wall of the said elliptical space area | region of a crank is the discharge port side of a medical connection instrument. If the exterior has a handle insertion port, the distance from the flow path (a) to the handle insertion port is shorter on the discharge port side than the discharge port side. By performing closer contact to the side, liquid leakage from the handle insertion port can be completely eliminated.
There is no restriction | limiting in particular as said rotation means, What is necessary is just to have the intensity | strength and magnitude | size which can endure rotation. Specifically, the rotating means is not limited as long as it has a structure that can be easily rotated by human power, such as a handle or an arm. The material of the rotation means may be the same material as the drive shaft or a different material.
Since the medical connecting device according to the present invention has such a structure, the flow path switching unit can be slid and fixed easily and reliably, and is particularly useful for medical use.
[9] In the medical connection instrument according to the present invention, it is preferable that the external connection portion has a backflow prevention mechanism that allows the exterior portion to open in the outward direction. Since the backflow prevention mechanism is provided, when the flow path (a) is shut off, the flow of infusion, etc. is only to the outside through the external connection part. Inflow of fluid can be prevented. For this reason, infection with bacteria etc. can be prevented.
[10] Further, examples of the backflow prevention mechanism include a filter and a check valve. Among these, a check valve is preferable. If it is a check valve, connection to the outside can be more easily implemented.
[11] Further, the check valve includes a packing composed of an upper packing and a lower packing, and an outer cylinder. The packing is held in the outer cylinder, and a lower surface of the upper packing and an upper surface of the lower packing It is preferable that the upper packing and the lower packing have notches penetrating the upper and lower surfaces.
In such a check valve, the upper packing side surface and the outer cylinder inner wall, the lower packing side surface and the outer cylinder inner wall may be in close contact or have a space, but preferably have a space. . By having a space, for example, when a syringe or the like is inserted into the check valve and the fluid in the medical connection device is sucked in, the deformation of the upper packing and the lower packing can be absorbed in the space, so that the syringe and the like can be inserted smoothly. At the same time, the sealing property between the syringe and the valve can be maintained, and the fluid backflow prevention effect is excellent.
In the check valve, the upper surface of the lower packing may have a protruding valve. When the protruding valve is inserted into, for example, a syringe, the lower valve is opened from the protruding valve by negative pressure, and fluid can be sucked into the syringe. Moreover, the inflow of the fluid from the upper part can be prevented. When a protruding valve is present on the upper surface of the lower packing, it is preferable that the lower surface of the upper packing has a recess in a corresponding shape so that the lower surface of the upper packing and the upper surface of the lower packing are in close contact. Close contact can prevent dead space on the joint surface.
Moreover, it is preferable that the space between the outer cylinder portion and the upper and lower packings has a structure in which no fluid flows from the upper packing and the lower packing.
For the incision, a three-sheet valve or a two-sheet valve can be preferably used, and four or more valves may be used.
[12] It is preferable that the upper surface of the upper packing and the lower surface of the lower packing have a concave recess, and the notch is in the center of the recess. Since the upper surface of the upper packing has a concave depression and a notch is formed at the center of the depression, it is possible to easily connect a syringe or the like. In particular, since the insertion of the injection needle and the like can be performed accurately and easily, damage to the upper packing due to an erroneous insertion of the injection needle or the like can be minimized.
Moreover, such a notch | incision may be added at the time of manufacture of packing, and can also be added just before use after manufacture of packing.
[13] It is preferable that the lower surface of the lower packing is provided so as to be in close contact with the blocking portion surface when the flow path (a) is opened. In the state where the channel (a) is completely open, there is no gap between the lower surface of the lower packing and the surface of the blocking part, so that no liquid pool is created in the gap and dead space can be prevented. .
[14] The check valve may be a single packing, and the single packing preferably has a notch penetrating the upper and lower surfaces of the single packing. The single packing means a packing consisting of only one part.
In this case, the incision is preferably a three-sheet valve or a two-sheet valve, and among these, a three-sheet valve is more preferable.
Moreover, such a notch | incision may be added at the time of manufacture of packing, and can also be added just before use after manufacture of packing.
[15] It is preferable that the upper surface and the lower surface of the single packing have a concave recess, and the notch is in the center of the recess. The effect is the same as [12].
[16] The lower surface of the single packing is preferably provided so as to be in close contact with the surface of the blocking part when the flow path (a) is opened. The effect is the same as [13].
[17] According to another preferable aspect of the medical connection instrument according to the present invention, a hollow exterior part having an introduction port and a discharge port at both ends, and further including a handle insertion port, and the inside of the exterior part Provided with a flow path blocking part for blocking the flow path (a) from the introduction port to the discharge port, and an external connection part joined to the mounting port,
The flow path blocking portion includes a blocking portion and a handle portion coupled to the blocking portion, and the blocking portion is in close contact with the inner wall of the flow path (a) of the exterior portion to block the flow path (a). The handle portion has a cross section that can slide while being in close contact with the inner wall of the handle insertion port in the exterior portion, and the flow path is blocked by sliding the flow path blocking section. . The effect is the same as [3].
[18] In the above aspect [17], it is preferable that the angle between the inlet direction of the flow path (a) and the sliding direction of the flow path blocking portion is 90 degrees or less. The effect is the same as [5].
[19] In the aspect of [17], it is preferable that a surface that blocks the flow path (a) in the blocking portion of the flow path switching unit has a convex curved surface. The effect is the same as [6].
As described in [1] and [2], in the catheter according to the present invention, the catheter end is connected to the discharge port end of any of the medical connection devices described in [3] to [19].
These connection parts may be removable or may be an integral structure that cannot be removed, but are preferably an integral structure that cannot be removed.
Still further, a catheter system according to the present invention includes the medical connection device according to any one of [3] to [19], an infusion route, and a catheter, and an inlet end of the medical connection device. In addition, an infusion route and a catheter are connected to the outlet end portion. A well-known thing can be employ | adopted for an infusion route and a catheter, and it does not specifically limit.
These connection parts may be removable or may be an integral structure that cannot be removed, but are preferably an integral structure that cannot be removed.
For this reason, it is possible to prevent dead space in the catheter and the catheter system and to easily switch or block the flow path. Further, the catheter portion can be sealed at the time of infusion back or infusion route replacement, and the infusion route can be easily sterilized or infused. For this reason, it is possible to easily and effectively prevent infection of bacteria or the like during the exchange of the drip bag and drip route. Furthermore, the air mixed in the site connected to the inlet such as the drip route can be smoothly discharged.
It should be noted that all prior art documents cited in the present specification are incorporated herein by reference.

FIG. 1- (1) is a perspective view illustrating an example of the medical connection instrument of the present invention, and is a diagram illustrating an example when the flow path (a) is open.
Fig. 1- (2) is a perspective view showing an example of the medical connection instrument of the present invention, and is a diagram showing an example when the flow path (a) is closed.
FIG. 2- (1) is a diagram illustrating an example of an AA cross-sectional enlarged view of FIG. 1- (1).
FIG. 2- (2) is a diagram illustrating an example of a CC cross-sectional enlarged view in FIG. 1- (2).
FIG. 3- (1) is a diagram illustrating an example of an enlarged cross-sectional view taken along the line BB of FIG. 1- (1).
FIG. 3- (2) is a diagram illustrating an example of a DD cross-sectional enlarged view in FIG. 1- (2).
FIG. 4- (1) and FIG. 4- (2) are examples of a cross-sectional view showing another aspect of the medical connection device of the present invention, and are views showing a cross-section at a position corresponding to FIG.
FIG. 5- (1) is a perspective view showing an example of the medical connection instrument of the present invention, and is a diagram showing an example when the flow path (a) is open.
FIG. 5- (2) is a perspective view showing an example of the medical connection instrument of the present invention, and is a diagram showing an example when the flow path (a) is closed.
6- (1) is a diagram illustrating an example of an enlarged cross-sectional view taken along line EE of FIG. 5- (1).
FIG. 6- (2) is a diagram illustrating an example of the FF cross-sectional enlarged view in FIG. 5- (2).
FIG. 7- (1) is a diagram illustrating an example of an enlarged cross-sectional view taken along the line EE of FIG. 5- (1).
FIG. 7- (2) is a diagram illustrating an example of an FF cross-sectional enlarged view in FIG. 5- (2).
FIG. 8- (1) is a perspective view showing an example of the medical connection instrument of the present invention, and is a diagram showing an example when the flow path (a) is open.
FIG. 8- (2) is a perspective view showing an example of the medical connection instrument of the present invention, and is a diagram showing an example when the flow path (a) is closed.
FIG. 8- (3) is a perspective view showing an example of the medical connection instrument of the present invention, and is a diagram showing an example of a perspective view of the medical connection instrument including a slide fixing means having a crank.
FIG. 8- (4) is a perspective view showing an example of the medical connection device of the present invention, and schematically shows a state where only the exterior cover is removed from the medical connection device including the slide fixing means having the crank. It is the figure shown in.
FIG. 8- (5) is a perspective view showing an example of the medical connection instrument of the present invention, and is an example of an exploded view of the medical connection instrument including a slide fixing means having a crank.
9- (1) is a diagram illustrating an example of a cross section of the external connection portion of the GG cross-sectional enlarged view in FIG. 5- (2).
FIG. 9- (2) is a diagram illustrating an example of a perspective view of the upper packing and the lower packing.
FIG. 10- (1) is an example of a plan view of the upper packing as viewed from above, and shows an example of a three-valve notch type.
FIG. 10- (2) is an example of a plan view of the upper packing as viewed from above, and shows an example of a two-valve cut type.
11- (1), (2), (3) is a figure which shows the example of another aspect of the cross section of the external connection part of the GG cross-section enlarged view in FIG. 5- (2).
FIG. 12 is a diagram illustrating an example in which a syringe is inserted into the external connection portion and fluid is extracted via the medical connection device of the present invention in the GG cross section in FIG.
FIG. 13- (1) is a diagram illustrating an example of a single packing and an example of a perspective view of the single packing.
FIG. 13- (2) is a diagram illustrating an example of a single packing, and an example of an HH cross-sectional enlarged view in FIG. 13- (1).
FIG. 13- (3) shows an example of a single packing, and is a diagram showing an example of another aspect corresponding to the HH cross-sectional enlarged view in FIG. 13- (1).
FIG. 14- (1) is a perspective view showing an example of the medical connection instrument of the present invention, and is a view showing an example when the flow path (a) is opened.
FIG. 14- (2) is a perspective view showing an example of the medical connection instrument of the present invention, and is a diagram showing an example when the flow path (a) is closed.
FIG. 15- (1) is a diagram illustrating an example of an II cross-sectional enlarged view of FIG. 14- (1).
15- (2) is a diagram illustrating an example of an enlarged cross-sectional view taken along the line KK in FIG. 14- (2).
FIG. 16- (1) is a diagram illustrating an example of the JJ cross-sectional enlarged view of FIG. 14- (1).
FIG. 16- (2) is a diagram illustrating an example of an enlarged LL cross section in FIG. 14- (2).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Medical connection instrument 2 Exterior part 3 Inlet port 4 Outlet port 5 Mounting port 6 Flow path switching part 7 External connection part 8 Handle insertion port 9 Blocking part 10 Handle part 11 Space 12 Outer cylinder 13 Upper packing 14 Lower packing 15 Space 16 Notch 17 notch 18 channel blocking surface of channel switching unit 19 end of blocking site 20 channel blocking surface of channel switching unit 21 slide cap 22 upper surface of upper packing 23 lower surface of lower packing 24 outer cylinder of lower packing Fixed retainer 25 Outer cylinder fixed folding part of upper packing 26 Syringe 27 Single packing 28 Upper surface of single packing 29 Lower surface of single packing 30 Incision 31 Hemispherical convex part 32 Medical connection instrument 33 Exterior part 34 Inlet 35 Discharge port 36 Flow path blocking part 37 Handle insertion port 38 Blocking part 39 Handle part 40 Space 4 Blockage region of the end portion 42 protruding valve 43 crankshaft 44 driving shaft 45 elliptical spatial region 46 arm 47 eccentrically around 48 rotation center hole 49 exterior casing 50 exterior cover D blockage region diameter H outlet width

  Hereinafter, the medical connection device according to the present invention will be described in detail with reference to the drawings, but the present invention is not limited thereto.

The medical connection device 1 of the present invention is a connection device between medical devices such as an infusion set, a blood transfusion set, a catheter and an infusion route. As shown in FIG. 1- (1) and FIG. 1- (2), the medical connection instrument 1 of the present invention normally includes an exterior part 2, a flow path switching part 6, and an external connection part 7. The exterior portion 2 has an introduction port 3 for connecting an infusion route and the like, a discharge port 4 for connecting a catheter and the like, and a mounting port 5 connected to the external connection portion 7 and a handle portion 10 of the flow path switching portion 6 slide. A handle insertion port 8 is provided.
2- (1) is an AA cross-sectional enlarged view of FIG. 1- (1), and FIG. 2- (2) is a CC cross-sectional enlarged view of FIG. 1- (2).
In FIG. 2- (1), the introduction port 3 and the discharge port 4 are connected, and the flow path (a) is formed. In this case, the blocking part 9 is accommodated in the space 11. In FIG. 2-(2), the flow path (a) is blocked by the blocking portion 9, and a flow path (b) including a space 11 for communicating the introduction port 3 and the mounting port 5 is formed.
In the present invention, the shape of the flow path (a) and the flow path (b) is not limited, but a cylindrical shape is preferable in order to prevent generation of a liquid pool or dead space.
Switching between the flow path (a) and the flow path (b) is performed by sliding the flow path switching section 6 within the exterior section 2 as shown in FIG. 2 (1) or (2).
As shown in FIGS. 2- (1) to (2), the handle portion 10 of the flow path switching unit 6 is in intimate contact with the inner wall of the exterior part 2 from the handle insertion port 8 toward the flow path (a). When the path switching unit 6 is slid, it slides in close contact with the inner wall. And the interruption | blocking site | part 9 closely_contact | adheres to the inner wall of a flow path (a), and interrupts | blocks a flow path (a).
FIG. 3- (1) is an enlarged view of the BB cross section of FIG. 1- (1), and FIG. 3- (2) is an enlarged view of the DD cross section of FIG.
As shown in FIG. 3-(1), the external connection portion 7 includes a packing made up of an upper packing 13 and a lower packing 14, and an outer cylinder 12. Further, the upper packing side face and the outer cylinder inner wall, and the lower packing side face and the outer cylinder inner wall have a space 15. Due to the presence of the space 15, the deformation of the upper packing and the lower packing can be absorbed in the space. Further, a protruding valve 42 may be provided on the upper surface of the lower packing.
Since the notch 16 is provided in the upper packing 13 and the notch 17 is provided in the lower packing 14, it is possible to connect to the outside by connecting a syringe or the like to the notches 16 and 17.
As shown in FIG. 3- (1), the lower surface 23 of the lower packing 14 preferably has a shape that can be in close contact with the surface of the blocking portion 9, and when the flow path (a) is open, It is preferable that the lower surface 23 of the packing 14 and the surface of the blocking portion 9 are provided in close contact with each other. Moreover, it is preferable that the inner wall of the exterior part 2 in the area | region of the space 11 also has a shape which can be closely_contact | adhered with the surface of the interruption | blocking site | part 9, and as shown to FIG. 3- (1), the flow path (a) is open | released. In this case, it is preferable that the corresponding inner wall surface and the surface of the blocking portion 9 are provided in close contact with each other. In a state where the flow path (a) is completely open, a liquid pool is generated by eliminating a gap between the lower surface 23 of the lower packing 14 or the corresponding inner wall surface and the surface of the blocking portion 9. Can be suppressed and dead space can be prevented.
As shown in FIG. 3 (2), the blocking portion 9 has a shape that can block the flow path (a), and is in close contact with the inner wall of the flow path (a) in the exterior portion 2. ). That is, the blocking portion 9 has a cross-sectional portion having the same shape as the cross section perpendicular to the flow path (a) direction of the exterior portion.
As shown in FIG. 3B, for example, when the cross section of the flow path (a) is circular, the outlet width H to the space 11 on the inner wall of the flow path (a) is the diameter D of the blocking portion 9. Preferably it is smaller. In this case, the outlet portion having the outlet width H functions as a fastener for the blocking portion 9 in either case of opening the channel (a) or opening the channel (b). The ratio (H / D) between the outlet width H and the diameter D of the blocking part 9 varies depending on the material used for these parts, but is preferably in the range of 0.8 to 0.98, for example.
FIG. 4- (1) and FIG. 4- (2) are examples in which the external connection portion 7 is provided at a different position, and an BB cross-sectional enlarged view of FIGS. 1- (1) and 1- (2). It corresponds to each figure or DD sectional enlarged view.
Although the external connection part 7 is connected with the horizontal direction in FIGS. 1-3, the position is not limited and the external connection part 7 may be connected with the upper surface like FIG. 4, for example. Among these, it is preferable that the external connection part 7 is connected with the side surface on the same plane as the flow path (a), that is, in the mode of FIGS. By being connected to the side surface, the residue can be reduced when the flow path (b) is opened and the fluid is sucked out by a syringe or the like.
FIG. 5- (1) and FIG. 5- (2) show perspective views when the flow path switching unit 6 slides obliquely. FIGS. 6- (1) and 7- (1) are enlarged views of the EE cross section of FIG. 5- (1), and FIGS. 6- (2) and 7- (2) are FIGS. It is a FF cross-sectional enlarged view of (2).
In the present invention, the direction in which the flow path switching unit 6 is slid is not particularly limited. For example, as shown in FIG. 2, the direction of the flow path (a) toward the inlet 3 and the sliding direction of the flow path switching unit 6 And the angle (θ) may be a right angle. Or as shown in FIG. 6 or FIG. 7, the said angle ((theta)) may be 90 degrees or less, and the flow-path switching part 6 may slide (slid) diagonally. Of these, the angle (θ) is preferably 90 degrees or less.
When the flow path switching unit 6 slides, the flow path (a) slides in the same direction as the flow from the inlet 3 to the outlet 4 (the direction of the arrow in FIG. 6- (1) or FIG. 7- (1)). By having the moving direction component, the flow of the fluid indicated by the arrow in FIG. 6- (1) or FIG. 7- (1) is gently blocked, and the flow of FIG. 6- (2) or FIG. The flow path can be switched in the direction indicated by the arrow (flow path (b)). Moreover, the resistance by the fluid to the flow-path switching part 6 concerning interruption | blocking can be reduced. On the other hand, the flow can be changed gently in the switching of the flow path from the flow path (b) to the flow path (a).
As shown in FIGS. 6- (1) and (2), in the flow path switching unit 6, the surface 18 that blocks the flow path (a) may be a flat surface, or FIG. As shown in (2), the surface 20 that blocks the flow path (a) may be a convex curved surface. Of these, a convex curved surface is preferable. By using the convex shape, the flow path can be switched gently.
The convex shape of the surface 20 is not particularly limited, and the cut shape on the horizontal plane is preferably a quadratic curve. In this case, residual liquid removal from the flow path (a) becomes smooth.
Further, as shown in FIG. 6- (1) and FIG. 7- (1), when the flow path (a) is completely opened and the flow path switching unit 6 is completely accommodated in the space 11, it is blocked. The end 19 of the part 9 is preferably a curved surface. Since the end 19 is a curved surface, when the flow path (a) is opened, the contact resistance of the fluid to the end can be reduced, so that the liquid pool can be suppressed and the dead space can be prevented.
The material of the exterior part 2 and the flow path switching part 6 (the blocking part 9 and the handle part 10) is not particularly limited. For example, as described above, the outlet width H is the diameter D of the blocking part 9 when switching the flow path. In order to have a smaller design and to function as a fastener (hook), it is preferable that the material has elasticity, high durability, and high adhesion.
Examples of such materials include polycarbonate, ABS resin, polyethylene resin, polypropylene resin, nylon resin, silicone rubber, natural rubber, butyl rubber, isoprene rubber, or nitrile rubber. Among these, the exterior portion 2 is polycarbonate, ABS resin, polyethylene resin, polypropylene resin or nylon resin is preferable, and the flow path switching unit 6 is preferably silicone rubber, natural rubber, butyl rubber, isoprene rubber or nitrile rubber. When such a material is used, the flow path switching unit 6 can be smoothly slid while maintaining elasticity while maintaining the sealing property between the flow path switching unit 6 and the inner wall of the exterior portion 2.
FIGS. 8- (1) and (2) are examples in which the flow path switching unit 6 includes a slide cap 21, and FIG. 8- (1) is a state in which the flow path (a) is opened. -(2) shows a state where the channel (a) is closed and the channel (b) is opened. Although the flow path switching unit 6 is switched by sliding the flow path switching unit 6, the slide cap 21 is provided so that the slide can be easily performed. In particular, when the channel (a) is opened and the channel (a) is opened to form the channel (b), the slide cap 21 can be used to easily switch the channel. .
The slide cap 21 may be further covered with a hermetic cover in contact with the outer surface of the exterior part. The hermetic cover is a cover for keeping a sealed state with the outside when the flow path switching unit 6 including the blocking part 9 and the handle part 10 slides on the exterior part. Examples of the material of the hermetic cover include flexible plastics such as vinyl chloride and polybutadiene, and silicone rubber. The cover made of such a material is excellent in hermeticity and can be sterilized.
FIG. 8- (3) shows an example of a slide fixing means including a crank. In this medical connection instrument, in the exterior part 2 composed of the exterior part cover 50 and the exterior part case 49, the arm 46 on the exterior part cover 50 side which is a rotating means is rotated to eccentrically rotate the crank, and the flow path switching part. Can be slid and fixed.
FIG. 8- (4) shows an example in which only the exterior cover 50 is removed and the flow path switching unit 6 is housed in the exterior case 49 in such a medical connection instrument.
In FIG. 8- (4) (a), the flow path switching unit 6 blocks the flow path (a) connecting the inlet 3 and the outlet 4. At this time, the crank 43 is fixed in pressure contact with the outlet 4 side in the elliptical space region 45. Such pressure contact can be performed by designing the size of the elliptical space region 45 to be slightly smaller than the circular diameter of the circular surface of the crank 43. For example, although depending on the material to be used, the diameter of the circular portion included in the elliptical space region is preferably 0.97 to 0.9999, more preferably about 0.98 to 0.999 of the diameter of the crank circle. It is preferable to be in the range. The arm 46 is connected to a drive shaft 44 (not shown) passing through the eccentric center 47 of the crank 43.
The material of the crank is preferably a metal such as aluminum or titanium, a rubber such as silicone rubber, natural rubber, butyl rubber, isoprene rubber or nitrile rubber, plastic such as polypropylene, polycarbonate, acrylic resin, ABS resin, Of these, metals are more preferred.
As described above, polycarbonate, ABS resin, polyethylene resin, polypropylene resin, nylon resin, silicone rubber, natural rubber, butyl rubber, isoprene rubber, nitrile rubber, or the like can be used as the material of the flow path switching unit 6.
In particular, when the crank material is the metal and the material of the flow path switching portion is the polymer material, the crank can be smoothly slid and fixed securely.
FIGS. 8 (4) and 8 (b) show the process of rotating the arm 46, eccentrically rotating the crank 43 and sliding the flow path switching unit 6, and FIGS. 8 (4) and 8 (c) show the flow path. The state which open | releases (a) is shown. At this time, the crank 43 is fixed in pressure contact with the outlet 4 side in the elliptical space region 45.
Although FIG. 8- (4) illustrates the structure in which the flow path switching unit 6 is exposed to the outside from the exterior part 49, the flow path switching unit 6 is accommodated in the exterior part 49 even after the flow path is switched. In addition, the structure may be sealed from the outside (not shown).
FIG. 8- (5) is an example showing an exploded view of a medical connection instrument including a slide fixing means using a crank. The arm 46 is connected to the drive shaft 44, and the drive shaft 44 passes through the exterior cover 50 and the arm 46 is disposed outside the exterior cover 50.
In this case, the drive shaft 44 may be configured to pass through the rotation center hole 48 provided in the exterior cover 50 and connect to the eccentric center of the crank 43, or through the exterior cover 50 and the crank 43, Furthermore, a structure penetrating to the exterior case 49 may be used.
Further, the crank 43, the drive shaft 44, and the arm 46 may be integrated or separated. Such a crank 43 is disposed in the elliptical space region 45 in the flow path switching unit 6.
The mounting port 5 is generated between the introduction port 3 and the channel switching unit 6 in a state where the channel switching unit 6 blocks the channel (a) (for example, FIG. 8- (4) (a)). It can be installed anywhere in the space. FIG. 8-(5) is an example in which the mounting opening 5 is provided on the exterior cover 50. Moreover, you may provide in the side surface of the exterior part case 49 (not shown).
The attachment port 5 can be provided with an external connection portion 7 as a backflow prevention mechanism. For example, a check valve, a rubber plug or the like can be used as the external connection portion 7 (not shown).

The external connection portion 7 that can be used in the present invention preferably has a backflow prevention mechanism. For example, the backflow prevention mechanism includes a filter, a check valve, and the like. Among these, a check valve can be preferably used. As the check valve, for example, a check valve having a mechanism shown in FIG. 9 can be preferably used.
The cross-sectional view of the check valve shown in FIG. 9- (1) is, for example, a GG cross-sectional enlarged view of the external connection portion 7 in FIG. 5- (2). The check valve includes a packing including an upper packing 13 and a lower packing 14 and an outer cylinder 12.
The upper packing 13 has a cut 16 penetrating from the upper surface 22 to the lower surface, and the lower packing 14 has a cut 17 penetrating from the upper surface to the lower surface 23.
In the check valve, the upper surface 22 of the upper packing 13 may be flat, but may have a concave depression, and preferably has a concave depression. In this case, it is preferable that the notch 16 exists in the center of a concave hollow. Similarly, the lower surface 23 of the lower packing 14 may be flat, but may have a concave depression, and among these, it is preferable to have a concave depression. In this case, it is preferable that the notch 17 exists in the center of a concave hollow.
The inner shape of the outer cylinder 12 may be the same as the outer shape of the side surface of the upper packing 13 and the side surface of the lower packing 14 and may be in close contact with each other, but more preferably the upper packing side surface, the inner wall of the outer cylinder, The packing side surface and the outer cylinder inner wall may have a space 15. Due to the presence of the space 15, the deformation of the upper packing and the lower packing can be absorbed in the space. Further, a protruding valve 42 may be provided on the upper surface of the lower packing. It is preferable that the lower surface of the upper packing and the upper surface of the lower packing are in close contact.
FIG. 9-(2) is a perspective view of the upper packing 13 and the lower packing 14. The lower packing 14 has a protruding valve 42, and the upper packing 13 has a recess corresponding to the shape.
The shape of the cuts 16 and 17 is not particularly limited. For example, as shown in FIG. 10, the cut 16 of the upper packing 13 is a three-valve valve as shown in FIG. 10- (1) or in FIG. 10- (2). The two-valve shown is mentioned. A similar shape can be adopted for the notch 17 of the lower packing 14.
The material of the upper packing 13 and the lower packing 14 is not particularly limited, and a known material such as silicone rubber, natural rubber, butyl rubber, isoprene rubber, or nitrile rubber can be used. Of these, silicone rubber is preferable. When such a material is used, it is possible to insert a syringe or the like while maintaining airtightness and excellent durability.
The material of the outer cylinder 12 is not particularly limited. For example, silicone rubber, natural rubber, butyl rubber, isoprene rubber, nitrile rubber, polycarbonate, ABS resin, polyethylene resin, polypropylene resin, nylon resin, or the like can be preferably used. Among these, the use of polycarbonate, ABS resin, polyethylene resin, polypropylene resin or nylon resin is excellent in strength and durability.
As another aspect of the upper packing 13, for example, as shown in FIGS. 11-(1) to (3), the upper packing 13 may have a cylindrical outer tube fixing folded portion 25. The packing (FIG. 11- (1)) having the upper packing 13 having the outer cylinder fixed folded portion 25 is inserted into the outer cylinder 12 (FIG. 11- (2)), and further, the outer cylinder fixed folded portion 25 is inserted. Is folded back (FIG. 11- (3)), the upper packing 13 can be more securely fixed to the outer cylinder 12.
In FIG. 11- (2), the connecting portion between the outer cylinder portion 12 and the upper packings 13 and 14 may be in close contact or open. In order to make the movement of the tip portion such as the syringe barrel inserted from the upper packing side smooth, it is preferable that there is a space 15.
Moreover, as another aspect of the lower packing 14, for example, as shown in FIG. 11- (1), the lower packing 14 may have an outer cylinder fixing clasp 24. The outer cylinder 12 and the lower packing 14 can be securely fixed by the outer cylinder fixing clasp 24.
Such an outer cylinder fixed folding | returning part 25 and the outer cylinder fixing clasp 24 may each be employ | adopted independently, but you may use together. By using together, since fixation from the upper part and the lower part is made | formed, the coupling | bonding of the outer cylinder 12 and packing can be performed more reliably.
FIG. 12 is an example in which, for example, a syringe 26 is inserted into the external connection portion 7 and fluid is extracted via the medical connection device 1 of the present invention. In this case, a space 15 exists between the outer cylinder 12 and the upper packing 13 and the lower packing 14. When the syringe 26 is inserted, the upper packing 13 and the lower packing 14 expand, but the space 15 can absorb the expansion.
As a check valve that can be used in the present invention, for example, a single packing 27 shown in FIG. 13 may be used instead of the packing. 13- (2) is an HH cross-sectional enlarged view of FIG. 13- (1). The single packing 27 is composed of a single component and has a notch 30 as shown in FIGS. 13 (1) and (2). The cut 30 is preferably a two-valve or three-valve cut, and more preferably a three-valve cut.
The upper surface 28 of the single packing 27 may be flat, but may have a concave depression, and preferably has a concave depression. In this case, it is preferable that the notch 30 exists in the center of a concave hollow. Moreover, although the lower surface 29 of the single packing 27 may be a plane, it may have a concave depression, and among these, it is preferable to have a concave depression. In this case, it is preferable that the notch 30 exists in the center of a concave hollow.
Further, as shown in FIG. 13- (3), the lower surface 29 of the single packing 27 may have a hemispherical convex portion 31 at the center of the concave recess. When the hemispherical protrusion 31 is present, backflow can be effectively prevented even when pressure is applied from below.
The material of the single packing 27 is not particularly limited, and a known material such as silicone rubber, natural rubber, butyl rubber, isoprene rubber or nitrile rubber can be used. Of these, silicone rubber is preferable. When such a material is used, it is possible to insert a syringe or the like while maintaining airtightness and excellent durability.

As another aspect of the medical connection instrument according to the present invention, as shown in FIGS. 14- (1) and (2), the medical connection instrument 32 of the present invention includes an exterior part 33, a flow path blocking part 36, Consists of. The exterior portion 33 includes an introduction port 34 that connects an infusion route and the like, a discharge port 35 that connects a catheter and the like, and a handle insertion port 37.
15- (1) is an enlarged sectional view taken along the line II in FIG. 14- (1), and FIG. 15- (2) is an enlarged sectional view taken along the line KK in FIG. 14- (2).
In FIG. 15- (1), the introduction port 34 and the discharge port 35 communicate with each other to form a flow path (a). In this case, the blocking part 38 is accommodated in the space 40. In FIG. 15-(2), the flow path (a) is blocked by the blocking portion 38 of the flow path blocking section 36.
The flow path (a) is blocked by sliding the flow path blocking section 36 in the exterior section 33, as shown in FIG. 15- (1) or (2).
As shown in FIGS. 15- (1) and (2), the handle part 39 of the flow path blocking part 36 is in close contact with the inner wall of the exterior part 33 from the handle insertion port 37 toward the flow path (a). When the road blocking part 36 is slid, it slides in close contact with the inner wall. And the interruption | blocking site | part 38 closely_contact | adheres to the inner wall of a flow path (a), and interrupts | blocks a flow path (a).
16- (1) is an enlarged view of the JJ cross section of FIG. 14- (1), and FIG. 16- (2) is an enlarged view of the LL cross section of FIG. 14- (2).
As shown in FIG. 16- (1), the inner wall of the space 40 of the exterior portion 33 has a shape that can be in close contact with the surface of the blocking portion 38, and when the flow path (a) is open, It is preferable that the inner wall of the space 40 region of the portion 33 is provided in close contact with the surface of the blocking portion 38. In the state where the flow path (a) is completely open, by eliminating the gap between the inner wall of the space 40 region of the exterior portion 33 and the surface of the blocking portion 38, it is possible to suppress the occurrence of liquid pool, Dead space can be prevented.
As shown in FIG. 16- (2), the blocking part 38 is in close contact with the inner wall of the channel (a) in the exterior portion 33 and blocks the channel (a). It has a shape that can block a). That is, the blocking portion 38 has a cross section having the same shape as the cross section perpendicular to the flow path (a) direction of the exterior portion.
As shown in FIG. 16- (2), the outlet width H to the space 40 of the inner wall of the flow path (a) is preferably smaller than the diameter D of the blocking portion 38. In this case, the outlet portion having the outlet width H functions as a stopper for the blocking portion 38 in either case of opening the channel (a) or blocking the channel (a). The ratio (H / D) between the outlet width H and the diameter D of the blocking part 38 varies depending on the material used for these parts, but is preferably in the range of 0.8 to 0.98, for example.
In the present invention, the direction in which the flow path blocking part 36 is slid is not particularly limited. For example, as shown in FIGS. 15- (1) and (2), the direction of the flow path (a) to the inlet 34 and the flow path Even if the angle (θ) with respect to the sliding direction of the blocking part 36 is a right angle, it may be slid (slid) at an angle of 90 degrees or less as described above (not shown). Among these, it is preferable that it is 90 degrees or less. By sliding obliquely, the flow path (a) can be gently blocked.
As shown in FIG. 15, in the flow path blocking unit 36, the surface that blocks the flow path (a) may be a flat surface, but as described above, the surface that blocks the flow path (a) is convex. It may be a curved surface. Of these, a convex curved surface is preferable. The convex shape of the surface is not particularly limited, and the cut shape of the horizontal plane is preferably a quadratic curve. In this case, the remaining liquid from the flow path (a) is smoothly removed.
Moreover, in FIG. 15, although the edge part 41 of the interruption | blocking site | part is an acute angle, it is preferable that it is a curved surface like the above. Since the end portion 41 of the blocking part is a curved surface, the liquid pool can be suppressed when the flow path (a) is opened, so that a dead space can be prevented.
There is no particular limitation on the material of the exterior portion 33 and the flow passage blocking portion 36 (the blocking portion 38 and the handle portion 39), and the same materials as described above can be used.
As described above, various different aspects have been shown as examples of aspects of the present invention, but each aspect can have the configuration and effects of the present invention described in other aspects.
Industrial Applicability The medical connection device of the present invention has a flow path switching portion, and the flow path switching portion slides and moves while being in close contact with the inner wall of the exterior portion forming the flow path. The flow path can be switched. Therefore, the catheter portion can be sealed at the time of infusion back or infusion route replacement, and the infusion route can be easily disinfected, infusion replacement, etc., and no dead space is generated.
As another aspect, the medical connection instrument of the present invention has a flow path blocking portion, and the flow path blocking section slides while moving in close contact with the inner wall of the exterior portion forming the flow path. The road can be blocked. Therefore, the catheter portion can be sealed at the time of infusion back or infusion route replacement, and the infusion route can be easily disinfected, infusion replacement, etc., and no dead space is generated.

Claims (19)

A hollow exterior having an inlet and outlet at both ends, and further equipped with a mounting port;
A flow path switching unit provided in the exterior part, for switching between a flow path (a) from the introduction port to the discharge port and a flow path (b) from the introduction port to the mounting port;
An external connection part joined to the mounting opening,
The flow path switching unit includes a blocking part and a handle part coupled to the blocking part, and the blocking part is in close contact with the inner wall of the flow path (a) of the exterior part to block the flow path (a). A discharge port end portion of a medical connection device that has a cross section that can be slid while being in close contact with the inner wall of the exterior portion, and that switches the flow path by sliding the flow path switching section. Further, a catheter end is connected to the catheter. The catheter according to claim 1, wherein the medical connection instrument is provided in an integral structure at the catheter end. A hollow exterior having an inlet and outlet at both ends, and further equipped with a mounting port;
A flow path switching unit provided in the exterior part, for switching between a flow path (a) from the introduction port to the discharge port and a flow path (b) from the introduction port to the mounting port;
An external connection part joined to the mounting opening,
The flow path switching unit includes a blocking part and a handle part coupled to the blocking part, and the blocking part is in close contact with the inner wall of the flow path (a) of the exterior part to block the flow path (a). A medical connecting device characterized in that the handle portion has a cross section that can slide while being in close contact with the inner wall of the exterior portion, and the flow path is switched by sliding the flow path switching portion. . The medical connection instrument according to claim 3, wherein the exterior part has a handle insertion port. The medical connection instrument according to claim 3 or 4, wherein an angle between the inlet direction of the channel (a) and the sliding direction of the channel switching unit is 90 degrees or less. The medical connection device according to any one of claims 3 to 5, wherein a surface that blocks the flow path (a) has a convex curved surface at a blocking portion of the flow path switching unit. The medical connection device according to any one of claims 3 to 6, further comprising slide fixing means for sliding or fixing the flow path switching unit. The slide fixing means is
A drive shaft penetrating the exterior portion;
A cylindrical crank having an eccentric center at a position eccentric from the center of the cylindrical circle, and wherein the drive shaft passes through the eccentric center in a direction perpendicular to the surface of the cylindrical circle;
Rotation means coupled to the drive shaft and rotating the crank eccentrically,
The crank is disposed in an elliptical space region provided in the flow path switching unit, and the drive shaft rotates eccentrically while the crank is inscribed in the inner wall of the elliptical space region. A slide is done,
8. The medical connection device according to claim 7, wherein the medical connection device is a slide fixing means in which the inner wall surface of the elliptical space region and the outer wall of the crank are pressed against each other to fix the flow path switching unit. The medical connection device according to any one of claims 3 to 8, wherein the external connection portion includes a backflow prevention mechanism that enables the exterior portion to be opened in the outward direction. The medical connection instrument according to claim 9, wherein the backflow prevention mechanism is a check valve. The check valve includes an upper packing and a lower packing;
An outer cylinder, and the packing is held in the outer cylinder,
The lower surface of the upper packing and the upper surface of the lower packing are in close contact,
The medical connecting device according to claim 10, wherein the upper packing and the lower packing have a cut through each upper and lower surface. The medical connecting device according to claim 11, wherein the upper surface of the upper packing and the lower surface of the lower packing have a concave recess, and the notch is in the center of the recess. The medical connecting device according to claim 11 or 12, wherein a lower surface of the lower packing is provided so as to be in close contact with a blocking portion surface when the flow path (a) is opened. The medical connection instrument according to claim 10, wherein the check valve is a single packing, and the single packing has a notch penetrating the upper and lower surfaces of the single packing. The medical connecting device according to claim 14, wherein the upper surface and the lower surface of the single packing have concave recesses, and the notches are in the center of the recesses. The medical connecting device according to claim 14 or 15, wherein the lower surface of the single packing is provided so as to be in close contact with the blocking site surface when the flow path (a) is opened. A hollow exterior part having an inlet and an outlet at both ends, and further having a handle insertion port,
Provided in the exterior part, comprising a flow path blocking part for blocking the flow path (a) from the introduction port to the discharge port, and an external connection part joined to the mounting port,
The flow path blocking portion includes a blocking portion and a handle portion coupled to the blocking portion, and the blocking portion is in close contact with the inner wall of the flow path (a) of the exterior portion to block the flow path (a). The handle portion has a cross section that can slide while being in close contact with the inner wall of the handle insertion port in the exterior portion, and the flow path is blocked by sliding the flow path blocking section. Medical connection device. The medical connection instrument according to claim 17, wherein an angle between the inlet direction of the channel (a) and the sliding direction of the channel blocker is 90 degrees or less. 19. The medical connection device according to claim 17, wherein a surface of the flow path switching unit that blocks the flow path (a) has a convex curved surface.

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